Michigan has reported 28 cases this year.
The group warns that under Kennedy more childhood vaccines will be in jeopardy.
For example, while overall coverage was 82% in Gaines County, the epicenter of the outbreak, school-based rates were as low as 46%.
In other developments, South Carolina suspects community transmission in an outbreak in the Upstate region.
All of Minnesota's 10 new cases were unvaccinated, including 7 in families with recent domestic travel and 3 in international travelers.
As Minnesota and California report more cases, New Mexico declared its outbreak over after 100 cases.
Elsewhere, Israel has now reported 6 child deaths from measles, 4 of them over the past week.
Georgia's health department reports 3 new measles infections with links to the state's most recent case.
Timely receipt of MMR1 remained unchanged across the study period, at about 54%.
Officials in the Americas have reported 11,313 cases so far this year.
